Hi, @janusface. It's great that they are having an exhibition, and it must be very cool to see so many gold coins! I'm definitely tempted to visit it once. As you might have guessed, I'm more likely to be visiting the Naturhistorisk Museum when I'm in Oslo.
And that trident coin looks nice! What type of metal is the white part?
Naturhistorisk museum is nice, and that remains me that I have not been at the NM for a long time. Should definitively go there soon. The white part is just some plastic encapsulating the coins, as I have not removed it from the box. Should probably have done that for better pics and for a more genuine feeling of the coins, but I do not have any gloves yet to handle it. Fingerprints (with biological residues) destroy coins (perhaps not so much gold) over time.
Ah, that makes sense now that you say it! I was thinking that it was part of the coin, and maybe was some sort of colored metal :P